JP7103976B2 - One-way valve and transmission - Google Patents

Description

The present invention relates to a one-way valve used in a hydraulic control assembly that controls hydraulic pressure supplied to a transmission such as a vehicle, and a transmission to which the one-way valve is attached.

In Patent Document 1, it is used to open and close the flow path of the fluid passage according to the fluid temperature, and also has a relief function of opening and closing the fluid passage according to the fluid pressure to make the whole compact and compact. The challenge is to provide a thermostat device that can achieve cost reduction.

In order to solve this problem, in Patent Document 1, a thermostat valve provided in the middle of the fluid passage and opening and closing according to the fluid temperature and the fluid passage integrally provided on the upstream side of the thermostat valve according to the fluid pressure are provided. It is equipped with a relief valve that opens and closes. Only when the fluid temperature of the fluid passage is equal to or higher than a predetermined temperature (high temperature state) and the fluid pressure is equal to or higher than a predetermined pressure, the flow paths in the passage are configured to communicate with each other. When the fluid temperature in the fluid passage is below a predetermined temperature (low temperature state), the thermostat valve remains closed, and even if the fluid pressure fluctuates and the relief valve is opened, the thermostat valve is in the passage. The flow path is configured to maintain a non-communication state.

Japanese Unexamined Patent Publication No. 2015-209906

By the way, when the vehicle is left for a long period of time, the oil in the torque converter falls into the oil pan, and there is a problem that creep torque is not generated by the time the refilling of the oil is completed at the time of restarting.

As a countermeasure, it is conceivable to seal the drain oil passage with a one-way valve when the oil pump is stopped so that the oil does not escape. In this case, in order to install the one-way valve, the hydraulic control assembly is specially designed to reduce the oil passage area in the part where the oil passage is difficult to handle, thereby securing the installation area for the one-way valve.

However, such a method has a new problem that the operation of the oil passage in the hydraulic control assembly becomes complicated.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a one-way valve that can be easily installed without complicating the routing of oil passages in the hydraulic control assembly.

Another object of the present invention is to provide a transmission to which a one-way valve is attached.

The first aspect of the present invention is a one-way that is inserted and fixed from the first inner peripheral surface to a pipe having a hollow portion having a first inner peripheral surface, a second inner peripheral surface, and a third inner peripheral surface in descending order of inner diameter. A valve having a cylinder having one end inserted and fixed inside the pipe and having a through hole through which oil flows in the axial direction, and a cylinder housed inside the pipe and having the cylinder at the other end. A pillar portion having an opening through which the oil flows from the portion and a plurality of lateral holes, and blocking the flow of the oil when the other end portion is inserted into one opening portion of the tubular portion. One end of the pillar portion is reciprocally inserted, and the diameter is larger than the inner diameter of the third inner peripheral surface. A collar member that comes into contact with a step formed by a difference in inner diameter, a spring attached between the other end of the pillar and the collar member, and a collar member that is fixed to the tip of the pillar and is fixed to the tip of the pillar. It has an E-ring to prevent it from falling off.

A second aspect of the present invention is a transmission having a hydraulic control assembly incorporating a plurality of hydraulic control valves and a case accommodating the hydraulic control assembly, wherein the one-way valve of the first aspect is included in the case. Is placed.

According to the first aspect of the present invention, it is possible to provide a one-way valve that can be easily installed without complicating the routing of oil passages in the hydraulic control assembly.

Further, according to the second aspect of the present invention, it is possible to provide a transmission in which a one-way valve is attached to a case.

FIG. 1A is a cross-sectional view showing the configuration of the one-way valve according to the present embodiment, particularly a state in which the flow of oil is blocked, and FIG. 1B is a cross-sectional view showing a state in which oil is circulated in one direction. FIG. 2A is a vertical cross-sectional view showing a pillar portion of a one-way valve, FIG. 2B is an exploded perspective view showing the pillar portion, and FIG. 2C is a vertical cross-sectional view showing a cylinder portion. It is a hydraulic circuit diagram which shows an example of the transmission which concerns on this embodiment. It is a schematic diagram which shows partially omitted the hydraulic pressure control assembly in which the hydraulic pressure control valve and the like are incorporated, and the M case which housed the hydraulic pressure control assembly. It is a figure which shows the state which attached the one-way valve which concerns on this embodiment to the pipe in M case after part part break.

Hereinafter, examples of embodiments of the one-way valve and transmission according to the present invention will be described with reference to FIGS. 1A to 5.

First, the one-way valve 10 according to the present embodiment is composed of, for example, metal parts, and as shown in FIGS. 1A and 1B, at least a tubular portion 12, a pillar portion 14, a collar member 16, a spring 18, O. It has a ring 20 and an E-ring 22, and a part of the ring 20 is inserted into a hollow portion 32 of an arbitrary pipe 30.

The tube 30 is formed in a tubular shape with one closed, and has a first opening 34a through which the tubular portion 12 is inserted and a second opening 34b formed in the peripheral wall. Of course, the second opening 34b may be formed in the closed upper portion and penetrated in the axial direction.

Further, in the pipe 30, the inner diameter of the hollow portion 32 is narrowed in three stages in the depth direction. That is, in the hollow portion 32, the first inner peripheral surface 36a, the second inner peripheral surface 36b, and the third inner peripheral surface 36c are formed in the depth direction from the first opening 34a, and the first inner peripheral surface 36a and the second inner surface are formed. The inner diameters da, db and dc of the peripheral surface 36b and the third inner peripheral surface 36c are da> db> dc.

On the other hand, the tubular portion 12 of the one-way valve 10 has a through hole 40 in which one end portion 12a is inserted and fixed in the hollow portion 32 of an arbitrary pipe 30 and oil (not shown) flows in the axial direction. In the pipe 30, oil flows through the inside of the pipe 30 through the first opening 34a and the second opening 34b described above.

As shown in FIG. 2C, the inner diameter of the through hole 40 of the tubular portion 12 changes in at least two steps in one direction, and the opening 42 having a larger inner diameter is the pillar portion 14 described later. The first outer diameter portion 50a of the above is slidable. An annular groove 44 for attaching an O-ring is formed on the outer peripheral surface of one end 12a of the tubular portion 12.

As shown in FIGS. 2A and 2B, the pillar portion 14 has an outer diameter narrowed in at least four steps in one direction, and the first outer diameter portion 50a and the second outer diameter portion 50a and the second outer diameter are narrowed from the rear end to the tip. The diameter portion 50b, the third outer diameter portion 50c, and the fourth outer diameter portion 50d are integrally formed and configured. A hollow portion 54 having an opening 52 on the end surface is formed in the first outer diameter portion 50a having the largest outer diameter, and a plurality of lateral holes 56 (through holes) are formed in the side wall of the hollow portion 54, for example, at equal intervals. Has been done.

A collar member 16 is reciprocally inserted through the fourth outer diameter portion 50d, which has the smallest outer diameter. The collar member 16 is provided with a plurality of protrusions 16a in a radial pattern. The diameter of the virtual circle formed by connecting the tips of the plurality of protrusions 16a is larger than the inner diameter dc of the third inner peripheral surface 36c in the hollow portion 32 of the pipe 30.

An annular groove 58 is formed at the tip of the second outer diameter portion 50 b , and an E-ring 22 (see FIGS. 1A and 2A) is fitted in the groove 58, for example. The E-ring 22 prevents the collar member 16 that reciprocates from the pillar portion 14 from falling off from the pillar portion 14.

Further, a spring 18 (compression spring) is mounted between the fourth outer diameter portion 50d and the collar member 16. By the intervention of the spring 18, the collar member 16 is always urged upward, that is, toward the E-ring 22.

Then, as shown in FIG. 1A, if the hydraulic pressure on the other end 14b side of the pillar 14 is less than a predetermined pressure, that is, lower than the sum of the hydraulic pressure on the one end 14a side and the pressure of the spring 18, the difference is The pillar portion 14 is pressed toward the cylinder portion 12 by the pressure. At this time, since the first outer diameter portion 50a of the pillar portion 14 is accommodated in the opening 42 of the cylinder portion 12 and is in a liquid-tightly sealed state, the oil directed from the cylinder portion 12 to the first opening 34a of the pipe 30 Distribution is blocked.

On the contrary, as shown in FIG. 1B, if the hydraulic pressure on the other end 14b side of the pillar portion 14 is higher than a predetermined pressure, that is, higher than the sum of the hydraulic pressure on the one end 14a side and the pressure of the spring 18. Due to the differential pressure, the pillar portion 14 is pressed toward the inner peripheral surface side of the pipe 30 in the depth direction. At this time, the collar member 16 comes into contact with the step 38 formed by the difference in inner diameter between the second inner peripheral surface 36b and the third inner peripheral surface 36c in the pipe 30 at the tip of each protrusion 16a, and reaches the hollow portion 32. Is blocked from entering.

As a result, the portion of the pillar portion 14 excluding the collar member 16 moves in the hollow portion 32 of the pipe 30, and the fourth outer diameter portion 50d of the pillar portion 14 together with the E ring 22 in the depth direction of the pipe 30. It will be located on the inner peripheral surface side. As a result, the first outer diameter portion 50a of the pillar portion 14 is separated from the opening 42 of the cylinder portion 12, and the plurality of lateral holes 56 of the first outer diameter portion 50a are exposed inside the pipe 30. Oil flows from 12 toward the inside of the pipe 30, and the oil is discharged outward through the first opening 34a of the pipe 30.

Then, the one-way valve 10 according to this embodiment is attached to the transmission 100 according to this embodiment shown in FIG.

As shown in FIG. 3, the transmission 100 includes at least a torque converter 102, an LC shift valve 104, an LC control valve 106, a cooler check valve 108, a TC check valve 110, a TC regulator 112, and an oil warmer. It has 114 and.

As schematically shown in FIG. 4, the transmission 100 has a hydraulic control assembly 120 (control system) incorporating the plurality of hydraulic control valves and the like described above, and an M case 122 accommodating the hydraulic control assembly 120. ..

Then, in the present embodiment, as shown in FIG. 5, in the M case 122, for example, the one-way valve 10 described above is attached to the pipe 130 (see FIG. 3) arranged between the TC check valve 110 and the oil warmer 114. Is attached later. In this case, the tubular portion 12 is arranged on the TC check valve 110 side, and the pillar portion 14 is arranged on the oil warmer 114 side.

In the example of FIG. 5, a one-way valve 10 composed of at least a tubular portion 12, a pillar portion 14, a collar member 16, a spring 18, an E-ring 22, and the like is provided inside the pipe 130 from the opening portion 134 of the joint 132 of the pipe 130. By inserting it, the one-way valve 10 can be easily retrofitted to the pipe 130 in the M case 122.

Then, for example, when the vehicle is left for a long period of time, hydraulic pressure less than a predetermined pressure is applied from the TC check valve 110 to the one-way valve 10, so that the first outer diameter portion 50a of the pillar portion 14 is the tubular portion 12 as described above. Since it is housed in the opening 42 of the above and is in a liquid-tightly sealed state, the flow of oil from the TC check valve 110 to the oil warmer 114 is blocked.

When the vehicle is being driven, a hydraulic pressure of a predetermined pressure or higher may be applied from the TC check valve 110 to the one-way valve 10 for various hydraulic pressure controls. At that time, as described above, each time a hydraulic pressure equal to or higher than a predetermined pressure is applied, a plurality of lateral holes 56 of the first outer diameter portion 50a are exposed inside the pipe 130, so that the inside of the pipe 130 from the cylinder portion 12 The oil circulates toward the oil, and the oil circulates from the TC check valve 110 to the oil warmer 114.

[Invention obtained from the embodiment]
The inventions that can be grasped from the above embodiments are described below.

[1] In the one-way valve 10 according to the present embodiment, one end portion 12a is inserted and fixed inside the pipe 30, and the cylinder portion 12 having a through hole 40 through which oil flows in the axial direction and the pipe 30 When the other end 14b has a plurality of lateral holes 56 housed therein and the oil flows through the other end 14b, and the other end 14b is inserted into one opening 42 of the cylinder 12, the oil It has a pillar portion 14 that blocks distribution.

If the hydraulic pressure on one end 14a side of the pillar 14 is higher than the hydraulic pressure on the other end 14b side, the differential pressure pushes the pillar 14 toward the cylinder 12. As a result, the other end 14b is inserted into one opening 42 of the cylinder 12, and the flow of oil from the cylinder 12 to the pipe 30 is blocked. Of course, the flow of oil from the pipe 30 to the cylinder 12 is also blocked.

On the contrary, if the hydraulic pressure on the one end 14a side of the pillar 14 is lower than the hydraulic pressure on the other end 14b side, the differential pressure pushes the pillar 14 toward the pipe 30. As a result, the other end 14b of the pillar 14 is separated from the one opening 42 of the cylinder 12, and oil flows from the cylinder 12 toward the pipe 30.

As described above, by adopting the above-described configuration, the one-way valve 10 can be easily attached to the pipe 30 piped in the hydraulic control assembly 120 without complicating the routing of the oil passage in the hydraulic control assembly 120. be able to.

[2] In the present embodiment, the collar member 16 is inserted through one end 14a of the pillar 14 and a plurality of protrusions 16a are provided radially, and the other end 14b and the collar member 16 of the pillar 14 are provided. It has a spring 18 attached between the and.

If the hydraulic pressure on one end 14a side of the pillar 14 is higher than the sum of the hydraulic pressure on the other end 14b and the pressure of the spring 18, the differential pressure presses the pillar 14 toward the cylinder 12. .. As a result, the other end 14b is inserted into one opening 42 of the cylinder 12, and the flow of oil from the cylinder 12 to the pipe 30 is blocked. Of course, the flow of oil from the pipe 30 to the cylinder 12 is also blocked.

On the contrary, if the hydraulic pressure on one end 14a side of the pillar 14 is lower than the sum of the hydraulic pressure on the other end 14b and the pressure of the spring 18, the differential pressure presses the pillar 14 toward the pipe 30. Will be done. As a result, the other end 14b (diameter expansion portion) of the pillar portion 14 is separated from one opening 42 of the cylinder portion 12, and oil flows from the cylinder portion 12 toward the pipe 30.

[3] In the present embodiment, an annular groove 44 is formed on the outer peripheral surface of one end 12a of the tubular portion 12, and an O-ring 20 attached to the annular groove 44 of the tubular portion 12 is provided. Thereby, the relative movement (sliding) between the pipe 30 and the cylinder portion 12 can be regulated, and the cylinder portion 12 can be prevented from coming off from the pipe portion 30.

[4] In the present embodiment, the E ring 22 is fixed to the tip of the pillar portion 14. As a result, it is possible to prevent the collar member 16 that reciprocates from the pillar portion 14 from falling off from the pillar portion 14.

[5] The transmission 100 according to the present embodiment is a transmission 100 having a hydraulic control assembly 120 incorporating a plurality of hydraulic control valves and an M case 122 accommodating the hydraulic control assembly 120. The one-way valve 10 according to the present embodiment is arranged in the case 122.

When the vehicle is left for a long period of time, the oil in the torque converter 102 falls into the oil pan (oil return), and there is a problem that creep torque is not generated until the refilling of the oil is completed at the time of restarting.

As a countermeasure, it is conceivable to seal the drain oil passage with the one-way valve 10 when the oil pump is stopped so that the oil does not escape. In this case, in order to install the one-way valve 10, the hydraulic control assembly 120 is specially designed, and the installation area for the one-way valve 10 can be secured by reducing the oil passage area in the portion where the oil passage is difficult to handle. Can be mentioned.

However, such a method raises a new problem that the routing of the oil passage in the hydraulic control assembly 120 becomes complicated.

Therefore, by attaching the one-way valve 10 according to the present embodiment to the M case 122 instead of the hydraulic control assembly 120, it is possible to stop the oil return from the torque converter 102 without changing the hydraulic control assembly 120. ..

Since it is not necessary to change the hydraulic control assembly 120, the work of attaching the one-way valve 10 is simple and low cost. Therefore, the one-way valve 10 can be easily retrofitted to a vehicle that requires measures against oil return from the torque converter 102.

[6] In the present embodiment, the M case 122 has at least one pipe 130, and at least one end portion 12a of the pillar portion 14 and the cylinder portion 12 of the one-way valve 10 is inserted and fixed inside the pipe 130. There is. As a result, the one-way valve 10 can be easily arranged in the M case 122 by inserting and fixing at least one end portion 12a of the pillar portion 14 and the tubular portion 12 of the one-way valve 10 inside the pipe 130.

[7] In the present embodiment, the one-way valve 10 is attached immediately before the upstream of the oil warmer 114 in the M case 122.

There are gaps in the seal ring, but if the pressure applied is small enough, surface tension can eliminate the leak. There are two cases in which the oil drains from the state where the oil is filled.
(1) It sucks air from the seal ring and escapes from the lubrication path.
(2) Suck air from the seal ring and remove it from the seal ring.

Of the above two cases, the case (2) occurs when there is a large gap in the outer circumference of the seal ring or the abutment portion when hydraulic pressure is not applied, and the seal ring is sucked from the upper side and discharged from the lower side. As a countermeasure, the free time diameter of the seal ring is increased so that it sticks to the outer peripheral side even when hydraulic pressure is not applied.

The case of (1) can be prevented by adding the one-way valve 10 to the lubrication path. Further, by blocking the lubrication path, negative pressure is not applied to the seal ring, which is effective for the case (2).

Therefore, by retrofitting the one-way valve 10 immediately before the upstream of the oil warmer 114 in the M case 122, it is possible to take measures against the oil drainage of (1) and (2) without making a significant change.

It should be noted that the present invention is not limited to the above-described embodiment, and of course, it can be freely changed without departing from the gist of the present invention.

10 ... One-way valve 12 ... Cylinder part 14 ... Pillar part 16 ... Color member 18 ... Spring 20 ... O-ring 22 ... E-ring 30, 130 ... Tube 32 ... Hollow part (tube) 34a ... First opening 34b ... Second opening 38 ... Step 40 ... Through hole (cylinder) 42 ... Opening (cylinder)
44 ... Circular groove (cylinder part) 50a ... First outer diameter part (pillar part)
50b ... 2nd outer diameter part 50c ... 3rd outer diameter part 50d ... 4th outer diameter part 52 ... Opening (pillar part)
54 ... Hollow part (pillar part) 56 ... Horizontal hole (through hole)
58 ... Circular groove (pillar) 100 ... Transmission 102 ... Torque converter 114 ... Oil warmer 120 ... Hydraulic control assembly 122 ... M case

Claims (4)

A one-way valve that is inserted and fixed from the first inner peripheral surface to a pipe having a hollow portion having a first inner peripheral surface, a second inner peripheral surface, and a third inner peripheral surface in descending order of inner diameter.
A tubular portion having one end inserted and fixed inside the pipe and having a through hole through which oil flows in the axial direction, and a tubular portion.
It is housed inside the pipe and has an opening through which the oil from the cylinder flows and a plurality of lateral holes at the other end, and the other end is inserted into one opening of the cylinder. It has a pillar that blocks the flow of oil when it is put in.
One end of the pillar is reciprocally inserted and has a diameter larger than the inner diameter of the third inner peripheral surface, and is formed by the difference in inner diameter between the second inner peripheral surface and the third inner peripheral surface. The color member that comes into contact with the step
A spring attached between the other end of the pillar and the collar member ,
A one-way valve having an E-ring fixed to the tip of the pillar and preventing the collar member from falling off . A transmission having a hydraulic control assembly incorporating a plurality of hydraulic control valves and a case accommodating the hydraulic control assembly.
A transmission in which the one-way valve according to claim 1 is arranged in the case. In the transmission according to claim 2 ,
The case has at least one tube and
A transmission in which at least one end of the tubular portion of the one-way valve is inserted and fixed inside the pipe. In the transmission according to claim 2 or 3 ,
The one-way valve is a transmission which is attached immediately before the upstream of the oil warmer in the case.

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